SQL
SQL is a free 4-week beginner course teaching SELECT queries, joins, subqueries, normalized schema design, and performance tuning using PostgreSQL and MySQL. Learners practice on real-world business datasets, covering window functions, indexing, transactions, and query optimization, and finish able to query and design relational databases confidently.
Write efficient queries, design schemas, and manage relational databases used by virtually every data-driven company.
What you'll learn
Course details
Duration
4 weeks
Best for
Anyone who works with data and needs to query it directly
This course is free
Course Curriculum
A module-by-module breakdown of what you'll cover in SQL.
01Getting Started & Environment Setup
4 topicsWeek 1
- Installing PostgreSQL or MySQL locally (or using a free cloud instance)
- Installing DBeaver or MySQL Workbench as your SQL client
- Connecting to your database and running your first query
- Loading the provided sample dataset for practice
02Basic
5 topicsWeek 2
- SELECT, WHERE, and filtering with logical operators
- Sorting, LIMIT/OFFSET, and removing duplicates with DISTINCT
- Aggregate functions, GROUP BY, and HAVING
- String and date functions, CASE expressions
- Project: Sales Data Explorer
03Intermediate
4 topicsWeek 2
- All JOIN types, self joins, and subqueries
- Window functions and CTEs
- Set operations and views
- Project: Customer Order Analysis Report
04Advanced
4 topicsWeek 3
- Keys, normalization, and entity-relationship diagrams
- Data types, constraints, and query execution plans
- Indexes, transactions, and ACID properties
- Project: Design a Normalized Schema
05Pro
4 topicsWeek 4
- Query performance tuning and indexing strategies at scale
- Partitioning, backups, and database migrations
- SQL injection prevention and access control
- Project: Optimize a Slow Reporting Query
06AI Pro
4 topicsWeek 4
- Using Claude, ChatGPT, and Perplexity to write and debug SQL
- Prompting for schema design and query optimization
- Verifying AI-generated SQL for correctness and security
- Final Capstone Project
Tools & Technologies
Hands-on practice with the same tools used by working professionals.
Part of a bigger program
This skill is one of the real building blocks inside these Career Programs— worth a look if you want the fuller, job-ready path instead of just this one piece.
Real-Time, Industry-Based Projects
This is project-based learning modeled on real industry scenarios — you'll build portfolio-ready work as you go, not just watch lectures.
Every course includes a guided internship on top of your project work — so you graduate with real experience, not just a certificate.
Communication & Soft Skills
Built into every course, alongside the technical curriculum.
Communication Skills
Practice explaining technical work clearly to teammates, managers, and clients.
Practical AI Skills
Hands-on training in using AI tools well — prompting, everyday workflows, and where AI actually helps versus where it doesn't.
Teamwork & Collaboration
Work in small project teams using real workflows like stand-ups and code reviews.
Problem Solving
Build the habit of breaking down ambiguous problems into clear, solvable steps.
Time Management
Learn to plan, prioritize, and deliver project work against realistic deadlines.
Presentation Skills
Present your project work and results with confidence, as you would to a client.
Resume & Profile Building
Build a strong resume, LinkedIn profile, and project portfolio that recruiters notice.
Interview Preparation
Mock interviews and portfolio reviews to get you ready for real job applications.
Career & Placement Support
100% of students enrolled in SQL get full access to placement support — real tools and guidance, not just a promise. This is support and access, not a guaranteed job outcome.
Resume Builder
A resume auto-built from your real completed projects and certificates, ready to export.
Shareable Portfolio
A public portfolio page showcasing your approved projects, with a link you can share with employers.
Interview Preparation
Guidance on presenting your projects and experience clearly in real interviews.
Peer & Mentor Community
Ongoing access to our learner community for questions, feedback, and support after you finish.
What Your Certificates Look Like
Real, verifiable certificates with your name, SQL, and a QR code anyone can scan to confirm they're genuine — one for completing the course, and a separate one if you take the internship track. Earning a certificate is free. To view, download and share it, there's a one-time ₹100 release fee per certificate — the same for free-course, paid-course and internship certificates.
Course Completion Certificate
Data24ZoneCertificate of Completion · Free Course
Illustrative recipient
Your Name Here
Example certificate for completion of
SQL
- Certificate No.
- D24-SAMPLE
- Mode
- Self-Paced
- Duration
- 4 weeks
- Example issue date
- On completion
Sample only — not a real, issued certificate.
Verification is available only on issued certificates.
Internship Completion Certificate
Data24ZoneCertificate of Internship
Illustrative recipient
Your Name Here
Example certificate for completion of
SQL
- Certificate No.
- D24-SAMPLE
- Mode
- Internship
- Duration
- 4 weeks
- Example issue date
- On completion
Sample only — not a real, issued certificate.
Verification is available only on issued certificates.
Frequently Asked Questions
What will I learn in the SQL course?
You'll learn: Writing SELECT queries, joins, and subqueries; Designing normalized database schemas; Aggregations, window functions, and performance tuning; Hands-on practice with real-world business datasets.
What tools and technologies does the SQL course cover?
This course covers: SQL, PostgreSQL, MySQL Workbench, DBeaver.
Is the SQL course beginner-friendly?
Yes — this is a beginner-level course. It starts with a "Getting Started & Environment Setup" module covering tool installation before the main curriculum.
How long does the SQL course take to complete?
The course is designed to be completed in approximately 4 weeks, depending on your pace.
What enrollment options are available for SQL?
Project Training Track (₹1,499) — One defined learning project and 2 review sessions; no employment or stipend included. Self-Paced (₹1,999) — Learn anytime with the full recorded curriculum and community access.
Is there an internship option for SQL?
Yes — the Internship track means working through real projects with our team and earning a separate Internship Certificate.
Will I get a certificate after completing SQL?
Yes. Self-paced enrollment earns a course completion certificate once your final project is reviewed and approved. Internship enrollment earns an internship certificate once your internship projects are approved. Every certificate is publicly verifiable on our website and can be added directly to your LinkedIn profile. Earning it is free; releasing it to view, download and share is a one-time ₹100 fee per certificate.
What kind of projects will I build in SQL?
You'll work on real projects such as: E-commerce sales query dashboard; Database schema for a booking system; Performance-optimized reporting queries.
Is placement support included with SQL?
Yes — every enrolled student gets full access to our placement support: resume building, a shareable project portfolio, mock interview preparation, and guidance applying what you've built to real job applications. This is support and access, not a guaranteed job outcome — how quickly it leads to an offer depends on the market and your own effort.
